Packaging cleanup

* Bump debhelper compat level to 13
* Set Rule-Requires-Root: no
* Update debian/watch to version 4
* Declare compliance with policy 4.6.1

debian/compat

@@ -1 +0,0 @@
-10

debian/control

@@ -1,11 +1,12 @@
 Source: libregexp-wildcards-perl
 Maintainer: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
 Homepage: https://metacpan.org/release/Regexp-Wildcards
-Standards-Version: 4.2.1
+Standards-Version: 4.6.1
 Vcs-Browser: https://git.in-ulm.de/cbiedl/libregexp-wildcards-perl
 Vcs-Git: https://git.in-ulm.de/cbiedl/libregexp-wildcards-perl.git
-Build-Depends: debhelper (>= 10~),
+Build-Depends: debhelper-compat (= 13),
 Priority: optional
+Rules-Requires-Root: no
 Section: perl
 
 Package: libregexp-wildcards-perl

debian/watch

@@ -1,2 +1,2 @@
-version=3
+version=4
 https://metacpan.org/release/Regexp-Wildcards   .*/Regexp-Wildcards-v?(\d[\d.-]*)\.(?:tar(?:\.gz|\.bz2)?|tgz|zip)$